“And Aharon shall make atonement upon its horns once a year with the blood of the sin offering of atonement – once a year he makes atonement upon it throughout your generations. It is most set-apart to יהוה.”
And Naḏaḇ and Aḇihu, the sons of Aharon, each took his fire holder and put fire in it, and put incense on it, and brought strange fire before יהוה, which He had not commanded them.